Caged in a cocoon, the silkworm dreams its last dream.
Explore a recreated Japan of the 80's, and what truth awaits you as you endure the horror...

Story

--The year is 198X.

Minato Jimba is a university student living in a boarding house in the city, away from his parents.
One night, Minato receives news from his father Eiji that his maternal grandmother, Kinu Miyama, is in critical condition,
He heads for Ichinose, a village deep in the mountains where his mother was born.

She had not seen her grandmother for more than ten years since she was a child.
Minato has always held a dislike for her grandmother, who did not even show up at the funeral of her own daughter, her late mother.
Minato had always felt aversion to her.

Swaying on the bus on the country road
Minato recalls the only time he spoke to his grandmother.

"--The silkworms, you know.
　Even if they could leave their cocoons
　They have no more mouths, and they can't fly.
　They lay their eggs and die."

People have made them that way."

The sky turns red and the shadow of the mountain looms in the dusk.
Minato is in this place.
Minato discovers a choking fear and a hidden truth.